OK, so I'm thinking of apping the DoctorDonna from "Journey's End." However, I'm trying to figure out how her existence would work in Adstringendum, since she's biologically unstable and her brain breaks down in about an hour in canon. Here's my idea, but if you have better ones, I'd love to hear them.

All the universes are being compressed, so I thought maybe time runs differently here. The hour that the DoctorDonna is able to live is stretched out like taffy. This still means she has to die once in a while, then reset at the beginning of that hour, and every death costs her something. Maybe a bit of a built-in angst factory, but I don't plan to overdo it.

Would this work at all?